Apparatus eoe preventing steam-boilers



' T.S,BAST O N.

STEAM APPARATUS FOR PREVENTING EXPLOSION.

No. 2,846. Patented Nov. 9, I842.

- E sTA'rEs THOS. S. EASTON, OF MOBILE, ALABAMA.

APPARATUS FOR PREVENTING STEAM-BOILERS FROM BURSTING.

Specification of Letters Patent No. 2,846, dated November 9, 1842.

To all whom it may concern Be it known that I, THOMAS S. EAsToN, of

the city of Mobile and State of Alabama, have invented a new andImproved h/lode of Preventing Steam-Boilers from Bursting; and I dohereby declare that the following is a full'and exact description.

The nature-Tot my invention consists in a steam vchest. placed withinthe boiler (a drawing of which accompanies this application) and on topof the fines or flue if a flue boiler. If the boiler iswithout fines thesteam chest is secured to the shell of the boiler on a stand that willlift it above the Water line. In the top of the steam chest (which ismarked G in the drawing) is a valve which opens downward into the chest.The valve stem D is united to a lever F by a pin oint which lever hasits fulcrum at E,

the weight G on the end of the lever will operate on the valve to keepit closed against any required pressure. To the steam chest I affix anescape pipe K leading through the shell of the boiler at any requiredpoint and made steam tight by the stuffing box L.

central region of the boiler; To the floats are attached the arms I by apin joint, which float arms are joined to the fulcrum stake E (alsobya'pin joint) below the lever one back to P at which place they arejoined,

and forming a leverof the first order, when brought in contact with thelever F. The floats and float arms are soarrangedthat as long as thereis suflicient water in the boiler,

they float free of the lever F, but themo v ment the low Water lineispassed the point P comes in contact with the lever F and counteractsthe Weight Gr thereby allowing the'valve to open and the steam escapeinto the chest and out of the boiler by the pipe K, the valve remainingopen till the boiler. is supplied with water. a 'feeler M which is a rodinserted in the I have also invented shell of the boiler, immediatelyover the V valve stem and made steam tight by a stuffing box, on thelower end of the rod is a button which when the rod is pressed downcomes in contact with the lever at or near its union with the valve stemwhich will enable the.

in the boiler, provided with a pipe to-carry off the steam, and a valvein its upper part opening downward, for the purpose and in the mannerdescribed. V

2. I also claim the feeler in combination with a valve within a boilerfor the purpose of opening the valve from Without the boiler asdescribed.

Witnesses:

JAuEs DAvIs, VRUTH LoNGE.

THosfs. EASTON. V

40 on each side, and these points extending A 1. The employment of asteam chest withl

